GB2525816B - Liquid crystal display apparatus and LED backlight module thereof - Google Patents

Liquid crystal display apparatus and LED backlight module thereof Download PDF

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Publication number
GB2525816B
GB2525816B GB1515928.8A GB201515928A GB2525816B GB 2525816 B GB2525816 B GB 2525816B GB 201515928 A GB201515928 A GB 201515928A GB 2525816 B GB2525816 B GB 2525816B
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
crystal display
display apparatus
backlight module
led backlight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB1515928.8A
Other languages
English (en)
Other versions
GB2525816A (en
GB201515928D0 (en
Inventor
Zhang Hua
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Publication of GB201515928D0 publication Critical patent/GB201515928D0/en
Publication of GB2525816A publication Critical patent/GB2525816A/en
Application granted granted Critical
Publication of GB2525816B publication Critical patent/GB2525816B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Led Devices (AREA)
  • Liquid Crystal (AREA)
  • Dc-Dc Converters (AREA)
GB1515928.8A 2013-03-11 2013-03-13 Liquid crystal display apparatus and LED backlight module thereof Expired - Fee Related GB2525816B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310076403.XA CN103165084B (zh) 2013-03-11 2013-03-11 液晶显示器及其led背光源
PCT/CN2013/072543 WO2014139104A1 (zh) 2013-03-11 2013-03-13 液晶显示器及其led背光源

Publications (3)

Publication Number Publication Date
GB201515928D0 GB201515928D0 (en) 2015-10-21
GB2525816A GB2525816A (en) 2015-11-04
GB2525816B true GB2525816B (en) 2020-01-08

Family

ID=48588121

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1515928.8A Expired - Fee Related GB2525816B (en) 2013-03-11 2013-03-13 Liquid crystal display apparatus and LED backlight module thereof

Country Status (6)

Country Link
JP (1) JP6109351B2 (zh)
KR (1) KR101708589B1 (zh)
CN (1) CN103165084B (zh)
DE (1) DE112013006674T5 (zh)
GB (1) GB2525816B (zh)
WO (1) WO2014139104A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103354083B (zh) * 2013-07-11 2015-06-17 京东方科技集团股份有限公司 背光源驱动电路及显示装置
CN103345903B (zh) * 2013-07-15 2015-09-02 深圳市华星光电技术有限公司 一种led背光系统及显示装置
CN105099411A (zh) * 2015-09-11 2015-11-25 深圳市华星光电技术有限公司 一种脉冲宽度调制电路
CN107871478B (zh) * 2017-12-26 2020-11-13 深圳Tcl新技术有限公司 显示模组的驱动电路、方法及显示设备
CN109523968B (zh) * 2018-12-24 2021-02-19 惠科股份有限公司 控制电路及显示装置
CN110149747B (zh) * 2019-05-15 2021-12-31 冠捷电子科技(福建)有限公司 用电源适配器直接供电给led灯管的驱动电路及设计方法
CN111999936B (zh) * 2020-08-27 2021-04-27 深圳市华星光电半导体显示技术有限公司 背光模组和显示装置
CN113744695A (zh) * 2021-08-04 2021-12-03 青岛鼎信通讯股份有限公司 一种应用于厂站终端的低成本led背光控制电路
CN116471723B (zh) * 2023-05-25 2023-09-15 湖北工业大学 一种基于恒流控制的led串联故障旁路电路及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030169226A1 (en) * 2002-01-23 2003-09-11 Seiko Epson Corporation Backlight control device for liquid crystal display
CN1949351A (zh) * 2005-10-11 2007-04-18 美国凹凸微系有限公司 视讯发光二极管给lcd屏的控制
US20070120506A1 (en) * 2005-11-30 2007-05-31 Semtech Corporation High efficiency power supply for LED lighting applications
CN101833929A (zh) * 2010-05-11 2010-09-15 福建捷联电子有限公司 一种液晶显示器单串led灯管推挽式直流高压驱动电路
CN201680231U (zh) * 2010-03-17 2010-12-22 Bcd半导体制造有限公司 一种lcd的led背光驱动装置
CN102479489A (zh) * 2010-11-26 2012-05-30 瑞萨电子株式会社 半导体集成电路及其工作方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003187614A (ja) * 2001-12-19 2003-07-04 Toyoda Gosei Co Ltd 車両用リアコンビネーションランプ装置
JP2006185942A (ja) * 2004-12-24 2006-07-13 Toshiba Matsushita Display Technology Co Ltd 面光源制御装置
CN101669271B (zh) * 2007-04-27 2013-04-10 皇家飞利浦电子股份有限公司 自激振荡开关电路以及包括这种开关电路的驱动器电路
JP5024789B2 (ja) * 2007-07-06 2012-09-12 Ｎｌｔテクノロジー株式会社 発光制御回路、発光制御方法、面照明装置及び該面照明装置を備えた液晶表示装置
JP5407548B2 (ja) * 2009-05-21 2014-02-05 ミツミ電機株式会社 スイッチング電源装置
CN201523469U (zh) * 2009-11-07 2010-07-07 桂林电子科技大学 一种智能化led脉冲驱动电路
JP2011249145A (ja) * 2010-05-27 2011-12-08 New Japan Radio Co Ltd Ｌｅｄ駆動回路
CN102074214A (zh) * 2010-12-23 2011-05-25 上海大学 单片集成led背光与lcd电源驱动系统
JP5901966B2 (ja) * 2011-01-13 2016-04-13 ローム株式会社 Ｌｅｄショート検出回路、ｌｅｄ駆動装置、ｌｅｄ照明装置、車両

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030169226A1 (en) * 2002-01-23 2003-09-11 Seiko Epson Corporation Backlight control device for liquid crystal display
CN1949351A (zh) * 2005-10-11 2007-04-18 美国凹凸微系有限公司 视讯发光二极管给lcd屏的控制
US20070120506A1 (en) * 2005-11-30 2007-05-31 Semtech Corporation High efficiency power supply for LED lighting applications
CN201680231U (zh) * 2010-03-17 2010-12-22 Bcd半导体制造有限公司 一种lcd的led背光驱动装置
CN101833929A (zh) * 2010-05-11 2010-09-15 福建捷联电子有限公司 一种液晶显示器单串led灯管推挽式直流高压驱动电路
CN102479489A (zh) * 2010-11-26 2012-05-30 瑞萨电子株式会社 半导体集成电路及其工作方法

Also Published As

Publication number Publication date
GB2525816A (en) 2015-11-04
KR20150126665A (ko) 2015-11-12
DE112013006674T5 (de) 2015-11-05
KR101708589B1 (ko) 2017-02-20
WO2014139104A1 (zh) 2014-09-18
JP2016516262A (ja) 2016-06-02
GB201515928D0 (en) 2015-10-21
CN103165084A (zh) 2013-06-19
JP6109351B2 (ja) 2017-04-05
CN103165084B (zh) 2015-08-19

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